The Boise Union Pacific Depot is a former train station in Boise, Idaho, United States. It was built in 1925 by the Union Pacific Railroad. In 1990 MK-Morrison Knudsen purchased the depot and renovated it to pristine condition. In 1996, the City of Boise took it over and opens it for tours and special events. It is open to the public on Sunday and Monday from 11:00 am to 5:00 pm.

Following the construction of the depot, service by Union Pacific's Portland Rose began with service between Chicago, Illinois and Portland, Oregon.[4] Union Pacific discontinued the Portland Rose (along with all its passenger rail service) on 1 May 1971, the day Amtrak began operating.[4][5]

Amtrak (the National Railroad Passenger Corporation) began service to the station in 1977 with the Pioneer,[6] which originally provided service between Salt Lake City, Utah and Seattle, Washington, but was eventually extended further east and provided daily service from Chicago, Illinois to Seattle. Originally the next eastbound stop on the Pioneer was in Mountain Home,[6] but that station was dropped as a stop in 1981,[7] so the next eastbound stop was in Shoshone. The next westbound stop was in Nampa.[6]

The Boise Depot was listed on the National Register of Historic Places on 7 August 1974, as the Union Pacific Mainline Depot.[8] The last passenger train to use the depot was the Pioneer, which ended service in 1997.[5]